public static void main()

in harness/src/main/java/org/apache/geode/perftest/analysis/Analyzer.java [31:114]
71 lines of code
17 McCabe index (conditional complexity)

  public static void main(String[] args) throws IOException {
    if (args.length != 2) {
      System.out.println(
          "Analyzer takes two test output directories as arguments, test results followed by baseline run result.");
      System.exit(1);
      return;
    }

    String baselineResultArg = args[0];
    String testResultArg = args[1];

    File testResultDir = new File(testResultArg);
    File baselineResultDir = new File(baselineResultArg);

    boolean valid = true;
    if (!testResultDir.exists()) {
      System.out.println("Unable to find test result directory: " + testResultArg);
      valid = false;
    }
    if (!baselineResultDir.exists()) {
      System.out.println("Unable to find test result directory: " + baselineResultArg);
      valid = false;
    }
    if (!valid) {
      System.exit(1);
      return;
    }

    boolean isCI = System.getProperty("TEST_CI", "0").equals("1");

    System.out.println("Running analyzer");
    System.out.println(
        "Comparing test result at " + testResultArg + " to baseline at " + baselineResultArg);

    BenchmarkRunAnalyzer analyzer = new BenchmarkRunAnalyzer();
    analyzer.addProbe(new YardstickThroughputSensorParser());
    analyzer.addProbe(new YardstickPercentileSensorParser());
    analyzer.addProbe(new YardstickHdrHistogramParser());

    BenchmarkRunResult benchmarkRunResult =
        analyzer.analyzeTestRun(baselineResultDir, testResultDir);
    benchmarkRunResult.writeResult(new PrintWriter(System.out));
    /* throw exc if failed? */

    String errorFilePath = testResultArg + "/../../../failedTests";
    BufferedWriter writer = new BufferedWriter(new FileWriter(errorFilePath, true));

    boolean isSignificantlyBetter = false;
    boolean isHighWaterCandidate = true;
    StringBuilder errorMessage = new StringBuilder();
    for (BenchmarkRunResult.BenchmarkResult benchmarkResult : benchmarkRunResult
        .getBenchmarkResults()) {
      for (BenchmarkRunResult.ProbeResult probeResult : benchmarkResult.probeResults) {
        if (isNaN(probeResult.baseline) || isNaN(probeResult.test)) {
          errorMessage.append("BENCHMARK FAILED: ").append(benchmarkResult.name)
              .append(" missing result file.\n");
          writer.append(benchmarkResult.name + "\n");
        } else if (probeResult.description.equals("average latency")) {
          if (probeResult.getDifference() > 0) {
            isHighWaterCandidate = false;
            if (probeResult.getDifference() >= 0.05) {
              errorMessage.append("BENCHMARK FAILED: ").append(benchmarkResult.name)
                  .append(" average latency is 5% worse than baseline.\n");
              writer.append(benchmarkResult.name + "\n");
            }
          } else if (probeResult.getDifference() <= -0.5) {
            isSignificantlyBetter = true;
          }
        }
      }
    }
    writer.close();

    if (isCI && isHighWaterCandidate && isSignificantlyBetter) {
      System.out.println(
          "NEW HIGH WATERMARK COMMIT: average latency for each test is <=0.0% change from baseline AND at least one test shows a >=5% improvement in performance.\n");
    }

    if (errorMessage.length() > 0) {
      System.out.println(errorMessage);
      System.exit(1);
    }

  }